In recent years, with the increase of traffic accidents and the further development of aging, the incidence of pelvic fracture is gradually increasing. Based on the in-depth study about biomechanics of pelvic fracture fixation, the surgical treatment has been widely carried out. The purpose of surgical treatment is to effectively reduce and fix the fracture, correct deformity, restore integrity and stability of the pelvis, and minimize the complications caused by internal and external fixation. How to improve stability of the pelvis while ensuring therapeutic effect is a problem that every doctor will face in clinic. This paper summarizes the biomechanical research progress of pelvic fracture in recent years from the aspects of anatomy, normal biomechanics, classification and biomechanics of pelvic fracture fixation, so as to provide some references for reasonable treatment of pelvic fracture.